Company lists · Data refreshed September 2026

Top 23 Enterprise app security companies based in London, United Kingdom

Name: Enterprise app security companies based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 61 companies tracked

RevenueBase identified 61 company matches for enterprise app security companies associated with London, United Kingdom as of September 2026 and tracks 701 professional contacts across them, including 208 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers company matches for enterprise app security companies associated with London, United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 28, 2026 How this list was built

61Companies

701Contacts tracked

208Verified emails

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The 23 largest enterprise app security companies based in London, United Kingdom

Ranked by team size

Top 23 of 61 company matches for enterprise app security companies based in London, United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Titania LTD	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	88 contacts →
	Exact match “Dedicated to securing the networks society depends on.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Intruder	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	61 contacts →
	Exact match “Intruder's continuous exposure management platform helps security, IT, and engineering teams stop breaches before they start.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	Garrison NOW A Part Of Everfox	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	60 contacts →
	Exact match “Garrison is a London-based cybersecurity company founded in 2014 by David Garfield (CEO) and Henry Harrison (Chief Scientist).” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Riversafe	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	57 contacts →
	Exact match “We deliver services in Cybersecurity, Application Security and DevOps and are trusted by some of the world’s leading brands to maximise the value of their security investments and…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	snapsec.co	Exact match	London, United KingdomHQ recorded Sep 28, 2026	1-10	30 contacts →
	Exact match “SnapSec is a cybersecurity company specializing in centralized application security operations.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	LICEL	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	28 contacts →
	Exact match “Licel is a mobile channel protection company.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	Nanjgel Solutions	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	24 contacts →
	Exact match “Nanjgel Solutions is focused on delivering the best IT security for businesses.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	Cyberrey	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	18 contacts →
	Exact match “Your Trusted Distribution & Security Solutions in Building and Securing Your Digital Ecosystem Cyberrey is a leading distributor of comprehensive cybersecurity solutions…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	CST Limited Computer Security Technology	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	17 contacts →
	Exact match “We are a London based specialist supplier of cyber defence solution and information security services.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Blackout Technologies	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	16 contacts →
	Exact match “Protect your sensitive corporate information against the risks from mobile devices and social media exposure.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	PC Power International LTD	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	10 contacts →
	Exact match “PC POWER INTERNATIONAL LTD is a computer & network security company based in the City, London, United Kingdom.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Defenx	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	10 contacts →
	Exact match “Defenx is an IT company that has an extensive background in providing businesses with cloud based security solutions and support for their digital infrastructure.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	Threat Protect	Exact match	London, United KingdomHQ recorded Sep 28, 2026	1-10	7 contacts →
	Exact match “Threat Protect is a vendor-agnostic cybersecurity, compliance and AI governance partner based in London, working with organisations across finance, legal, energy, pharma…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Grove Group	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	3 contacts →
	Exact match “Grove unlocks business success by defending our customers with the most advanced cybersecurity solutions in the market place today.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Cyberlegion	Exact match	London, United KingdomHQ recorded Sep 28, 2026	1-10	3 contacts →
	Exact match “CyberLegion is a UK/EU-based cybersecurity company helping organizations build, test and operate secure digital products.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	Sense Defence AI	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	2 contacts →
	Exact match “Sense Defence is a leading web security company powered by advanced AI, offering a suite of cutting-edge tools including an AI-driven Web Application Firewall (WAF), bot detection…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	Cansol Consulting	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	2 contacts →
	Exact match “Founded in 2017, Cansol is a Cyber Security company with office in London and Dubai.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Essential Security UK LTD	Exact match	London, United KingdomHQ recorded Sep 28, 2026	1-10	2 contacts →
	Exact match “Essential Security is a unique company in that we offer a specialised and confidential service meeting your bespoke technological and communications requirements.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	Checksec	Exact match	London, United KingdomHQ recorded Sep 28, 2026	1-10	2 contacts →
	Exact match “CheckSec is a UK based provider of security services and technologies, with a global focus.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Secure Delivery	Exact match	London, United KingdomHQ recorded Sep 28, 2026	1-10	2 contacts →
	Exact match “Secure Delivery is an application security consulting and training company helping regulated organisations securely deliver software systems at pace and scale.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	soc.os	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	1 contacts →
	Exact match “SOC.OS has joined the Sophos family!” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	Websecurify	Exact match	London, United KingdomHQ recorded Sep 28, 2026	1-10	1 contacts →
	Exact match “Websecurify is a web application security company.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Reconditorium	Exact match	London, United KingdomHQ recorded Sep 28, 2026	1-10	1 contacts →
	Exact match “Software security consulting, with a specialism in mobile & web technologies.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “enterprise app security companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 23 of 61 enterprise app security companies based in London, United Kingdom

See the full list, filter by size, metro and specialty, and access 208 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Enterprise app security companies based in London, United Kingdom at a glance

As of Sep 28, 2026

29.7%Verified-email coverage

11.5Average contacts per company

11-50Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

10001+

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 61 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with London, United Kingdom whose business descriptions match “enterprise app security companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every displayed company carries at least one verified work email. RevenueBase tracks 208 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 28, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “enterprise app security companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many enterprise app security companies are there based in London, United Kingdom?

RevenueBase identified 61 company matches for enterprise app security companies associated with London, United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Titania LTD tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United Kingdom has the most enterprise app security companies?

London leads the United Kingdom with 61 company records, followed by Edinburgh (5) and Manchester (4).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 208 professional contacts with verified work emails tracked across these 61 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.